Improvement in crank door-bells



I y 2Sheets--Sheet1. -W. E. SIMONDS.

N0.156.,439. A Patented N0v.3,1a74.

commonly fastened.

UNITED STATES PATENT CEEICE.

WILLIAM E. sIMONDs, OE HARTFORD, CONNECTICUT.

IMPROVEMENT IN CRANK DOOR-BELLS.

l i 4 w Specification forming part of Letters Patent No. 156,439, datedNovember 3, 1874; application led september 11, 1872.

To all whom it may concern:

Be it known that I, WILLIAM E. SIMONDs, of Hartford, in the county ofHartford and State ofConnecticut, have invented certain new andusefulImprovements in Crank Door- Bells, of which the following isaspecication, reference being had to the accompanying drawings, inWhich- Figure l is a plan view of the bell with the sounding-shellremoved. Fig. 2 is a sectional View Of the same through the line a: m.Fig. 3 is a plan View of a modification of the bell, as shown in Figs. land 2, with the soundingshell removed. Fig. 4 is a side View of thebell. (Shown in Fig. 3.)

I will first describe the modification of the bell. (Shown in Figs. land 2.)

The letter a indicates the base-plate of the bell, and b the door uponwhich such bells are cV is the central post, on the top of which screwsthe common concave soundingshell. lIhe letter d indicates the hammer,pivoted on the pin d1, and having its throw given by the spring cl2. d3is the stoppin, which defines the throw ofthe hammer. The letters e e1c2 indicate the three'horns of a forked tumbler pivoted on the pin f,the up per two of which, e1 e2, play upon the pin d4, which is on theend of the hammer, and the other of which is played upon by the spurs fit' i of the star-wheel A, which has a base projecting through the platea, and turning therein, being actuated by the spindle g running throughthe door, and having upon its farther end the crank h, whereby the bellis operated.

When the crank is turned in either direction the star-wheel is revolved,and one or the other of its spurs will come in contact with the fork e,and carry it along, causing one of the forks el e2 to raise the butt ofthe hammer, so as to draw back the hammer-head for a stroke. When thehammer-head is drawn back sufficiently, and before the pin d4 can escapefrom the fork el or c2, which is raising it, the spurt' slips by thefork e, and allows the hammer to strike and sound the bell. This actionobviously takes place when the crank is turned in either direction.

All of the forks of the tumbler are raised somewhat from the base-plate,only the center thereof resting on the base-plate, so that these forksmay only come in' contact, respectively, with the pins d4 and i i Ai,and not with the body of the hammer or of the star-wheel.

lhe form of bell (shown in Figs. 3 and 4) is substantially the same asshown in Figs. 1 and 2, the similar parts being lettered the same inboth cases. The only diiierence is, that the three forked tumbleroperates upon a V-shaped piece, x, on the end of the hammer-arm insteadof upon a round pin, as d4; and this V-shaped piece striking down intothe forks of the tumbler no stop-pin is needed.

I claim as my inventionlhe combination and arrangement of the starwheel,the forked tumbler pivoted outside of the star-Wheel, and a singlehammer, the tumbler operating to trip the single hammer by the rotationof the star-wheel in either direction, substantially as described, andforl

